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<p>Hi,</p>
<p>just to inform the collaboration that the problem with neutron
production with the Deuterium target will probably be solved with
the coming release of GEANT4.</p>
<p><br>
</p>
<p>Lorenzo<br>
</p>
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<td>Re: [EXTERNAL] gammas on deuterium</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Wed, 13 Nov 2019 17:22:11 -0500</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>Lorenzo Zana <a class="moz-txt-link-rfc2396E" href="mailto:zana@jlab.org"><zana@jlab.org></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td>Wright, Dennis H. <a class="moz-txt-link-rfc2396E" href="mailto:dwright@slac.stanford.edu"><dwright@slac.stanford.edu></a>,
Maurizio Ungaro <a class="moz-txt-link-rfc2396E" href="mailto:ungaro@jlab.org"><ungaro@jlab.org></a></td>
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<p>Great,</p>
<p>we really appreciate the effort on solving this problem. As
soon as I can test it I will send you the updated plots.<br>
</p>
<p><br>
</p>
<p>Lorenzo</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 11/13/19 5:18 PM, Wright, Dennis
H. wrote:<br>
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<blockquote type="cite"
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> Hi,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> I have completed
and committed code to the Geant4 repository which should give
a much better modeling of the gamma-deuteron final state.
This is part of the Bertini cascade which is used as the
back-end of the electro-nuclear process. <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);">The
new code will be part of the Geant4 10.6 release coming out
in early December.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);">Hopefully
you will see an improvement in the Geant4 curve on the plot
you showed in September. Your validation of this will be
very useful.</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);">
I plan to extend this work to tritons and 3He when I have
time. </span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);">Dennis</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif;
font-size: 12pt; color: rgb(0, 0, 0);"> <span style="color:
rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica,
sans-serif; font-size: 12pt; background: var(--white);"><br>
</span></div>
</blockquote>
<pre class="moz-signature" cols="72">--
——————————
Lorenzo Zana
Radiation Physicist
Jefferson Lab
Tel. (O): +1 (757)269-6435
Web: <a class="moz-txt-link-freetext" href="http://userweb.jlab.org/~zana/" moz-do-not-send="true">http://userweb.jlab.org/~zana/</a></pre>
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